After accessing the archives, the ARC will deploy a significant force to prevent you from leaving. This will culminate in a mini-boss encounter with an 'ARC Commander' unit. The Commander is a larger, more agile version of a Sentinel, capable of deploying smaller drones and firing concentrated energy blasts. Focus fire on its exposed power core, which becomes visible after it performs certain attacks or when its shield is broken. Utilize cover and maintain distance. Once the Commander is defeated, clear any remaining ARC units to secure the area for extraction.
